diff --git a/portal-impl/src/com/liferay/portal/servlet/filters/secure/BaseAuthFilter.java b/portal-impl/src/com/liferay/portal/servlet/filters/secure/BaseAuthFilter.java
index c6e7cbc27ec601..0b9e6b45eb962d 100644
--- a/portal-impl/src/com/liferay/portal/servlet/filters/secure/BaseAuthFilter.java
+++ b/portal-impl/src/com/liferay/portal/servlet/filters/secure/BaseAuthFilter.java
@@ -34,6 +34,7 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.servlet.FilterChain;
@@ -373,12 +374,10 @@ private boolean _isDigestModified(HttpSession httpSession)
 			return false;
 		}
 
-		String digest = (String)httpSession.getAttribute(
-			WebKeys.USER_DIGEST);
-
 		user = UserLocalServiceUtil.getUser(user.getUserId());
 
-		return !StringUtil.equals(digest, user.getDigest());
+		return !Objects.equals(
+			user.getDigest(), httpSession.getAttribute(WebKeys.USER_DIGEST));
 	}
 
 	private static final Log _log = LogFactoryUtil.getLog(BaseAuthFilter.class);